If I want to accurately save information about the hardware I am using as a reference, what is the best way to do it? Are the contents of
There are several tools that you can use to capture specifics about your hardware. I would make use of the following set of tool to accomplish this.
NOTE: I would say no,
/proc/meminfo is not sufficient, unless you just want to know how much RAM your system has.
This is a good tool for getting a general purpose list of what's currently included in your system from a hardware perspective. It also includes what drivers are being used so it's usually the first tool I go to for such things. It can show you specific hardware (network, CPU, RAM, etc.) and also output the results in a short format (shown below) as well as output in JSON, HTML, or XML.Example
$ sudo lshw -short | head | expand H/W path Device Class Description ====================================================== system 900X3C/900X3D/900X4C/900X4D (System SKUNumber) /0 bus NP900X4C-A07US /0/0 memory 128KiB BIOS /0/4 processor Core i7 (To Be Filled By O.E.M.) /0/4/6 memory 32KiB L1 cache /0/4/7 memory 256KiB L2 cache /0/4/8 memory 4MiB L3 cache /0/5 memory 32KiB L1 cache
This tool takes a different approach and shows a dump of the system's DMI tables. This is essentially the view of the system's BIOS, in human readable form.excerpt
dmidecode is a tool for dumping a computer's DMI (some say SMBIOS) table contents in a human-readable format. This table contains a description of the system's hardware components, as well as other useful pieces of information such as serial numbers and BIOS revision. Thanks to this table, you can retrieve this information without having to probe for the actual hardware. While this is a good point in terms of report speed and safeness, this also makes the presented information possibly unreliable.
The DMI table doesn't only describe what the system is currently made of, it also can report the possible evolutions (such as the fastest supported CPU or the maximal amount of memory supported).
SMBIOS stands for System Management BIOS, while DMI stands for Desktop Management Interface. Both standards are tightly related and developed by the DMTF (Desktop Management Task Force).
$ sudo dmidecode | head -20 # dmidecode 2.12 # SMBIOS entry point at 0xdac46000 SMBIOS 2.7 present. 64 structures occupying 2909 bytes. Table at 0xDAC45000. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Phoenix Technologies Ltd. Version: P02ABK Release Date: 09/19/2012 Address: 0xE0000 Runtime Size: 128 kB ROM Size: 3072 kB Characteristics: PCI is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported
Another venerable tool for capturing a full snapshot of your system's overall hardware. Similar to
lshw, but IMO, probably the best overall tool for collecting this type of info. This is the tool that I generally reach for.
$ hwinfo --cpu | head -14 01: None 00.0: 10103 CPU [Created at cpu.446] Unique ID: rdCR.j8NaKXDZtZ6 Hardware Class: cpu Arch: X86-64 Vendor: "GenuineIntel" Model: 6.58.9 "Intel(R) Core(TM) i7-3517U CPU @ 1.90GHz" Features: fpu,vme,de,pse,tsc,msr,pae,mce,cx8,apic,sep,mtrr,pge,mca,cmov,pat,pse36,clflush,dts,acpi,mmx,fxsr,sse,sse2,ss,ht,tm,pbe,syscall,nx,rdtscp,lm,constant_tsc,arch_perfmon,pebs,bts,rep_good,nopl,xtopology,nonstop_tsc,aperfmperf,eagerfpu,pni,pclmulqdq,dtes64,monitor,ds_cpl,vmx,est,tm2,ssse3,cx16,xtpr,pdcm,pcid,sse4_1,sse4_2,x2apic,popcnt,tsc_deadline_timer,xsave,avx,f16c,rdrand,lahf_lm,ida,arat,epb,xsaveopt,pln,pts,dtherm,tpr_shadow,vnmi,flexpriority,ept,vpid,fsgsbase,smep,erms Clock: 905 MHz BogoMips: 4789.57 Cache: 4096 kb Units/Processor: 16 Config Status: cfg=new, avail=yes, need=no, active=unknown
This is nice info since it includes just about anything you'd want to know about the make, model, and feature set of your given CPU.
This tool will just show you specifics about your CPU.Example
$ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 2 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 58 Model name: Intel(R) Core(TM) i7-3517U CPU @ 1.90GHz Stepping: 9 CPU MHz: 1701.562 CPU max MHz: 3000.0000 CPU min MHz: 800.0000 BogoMIPS: 4789.57 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 4096K NUMA node0 CPU(s): 0-3
If you want to get into the nitty gritty details of your system's CPU there's
$ cpuid -1 | less version information (1/eax): processor type = primary processor (0) family = Intel Pentium Pro/II/III/Celeron/Core/Core 2/Atom, AMD Athlon/Duron, Cyrix M2, VIA C3 (6) model = 0xa (10) stepping id = 0x9 (9) extended family = 0x0 (0) extended model = 0x3 (3) (simple synth) = Intel Core i3-3000 (Ivy Bridge L1) / i5-3000 (Ivy Bridge E1/N0/L1) / i7-3000 (Ivy Bridge E1) / Mobile Core i3-3000 (Ivy Bridge L1) / i5-3000 (Ivy Bridge L1) / Mobile Core i7-3000 (Ivy Bridge E1/L1) / Xeon E3-1200 v2 (Ivy Bridge E1/N0/L1) / Pentium G1600/G2000/G2100 (Ivy Bridge P0) / Pentium 900/1000/2000/2100 (P0), 22nm miscellaneous (1/ebx): process local APIC physical ID = 0x3 (3) cpu count = 0x10 (16) CLFLUSH line size = 0x8 (8) brand index = 0x0 (0) brand id = 0x00 (0): unknown feature information (1/edx): x87 FPU on chip = true virtual-8086 mode enhancement = true debugging extensions = true page size extensions = true time stamp counter = true RDMSR and WRMSR support = true physical address extensions = true machine check exception = true CMPXCHG8B inst. = true APIC on chip = true SYSENTER and SYSEXIT = true memory type range registers = true PTE global bit = true machine check architecture = true conditional move/compare instruction = true page attribute table = true page size extension = true processor serial number = false ...
If you just want to query info that the Linux Kernel provides about your CPU without having to utilize a tool, such as
lscpu, you can always grok the
/proc filesystem. In the same manner that you originally asked with
/proc/meminfo, other hardware is also represented here as well, for example, the CPU.
$ head /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 58 model name : Intel(R) Core(TM) i7-3517U CPU @ 1.90GHz stepping : 9 microcode : 0x1b cpu MHz : 892.406 cache size : 4096 KB physical id : 0